source,target
"#include <stdio.h>
int main() {
    printf(""Hello, world!\n"");
    return 0;
}","A simple C program that prints 'Hello, world!' to the console."
"#include <stdio.h>

int factorial(int n) {
    if (n == 0)
        return 1;
    else
        return n * factorial(n - 1);
}

int main() {
    int n = 5;
    printf(""Factorial of %d is %d\n"", n, factorial(n));
    return 0;
}",A C program to calculate the factorial of a number using recursion.
"#include <stdio.h>

int main() {
    int n, sum = 0;
    printf(""Enter a number: "");
    scanf(""%d"", &n);
    for (int i = 1; i <= n; i++) {
        sum += i;
    }
    printf(""Sum of first %d natural numbers is %d\n"", n, sum);
    return 0;
}",A C program to calculate the sum of the first 'n' natural numbers.
"#include <stdio.h>

int main() {
 double a, b, product;
  printf(""Enter two numbers: "");
  scanf(""%lf %lf"", &a, &b);
  product = a * b;
   printf(""Product = %.2lf"", product);
 return 0; }",A C Program to Multiply Two Numbers
"#include <stdio.h>

 int main() {

    printf(""Hello, World!""); 

 return 0;
 }","Program to Display Hello, World!"
"#include <stdio.h>

 int main() {

 int number; 

 printf(""Enter an integer:"");

  scanf(""%d"", &number); 

 printf(""You entered: %d"", number);

 return 0;}",A C Program to Print an Integer
"#include <stdio.h>

 int main() {   

 int number; 

   printf(""Enter an integer:"");   scanf(""%d"", &number); 
 // displays output
 printf(""You entered: %d"", number);    

  return 0;  }", A Program to Print an Integer
"#include <stdio.h> 

 int main() {  

 char c; 

 printf(""Enter a character:"");

 scanf(""%c"", &c); 

   // %d displays the integer value of a character 

 // %c displays the actual character 

 printf(""ASCII value of %c = %d"", c, c);

 return 0; }",A Program to Print SCII Value
"#include <stdio.h> 

 int main() {

 int dividend, divisor, quotient, remainder; 

 printf(""Enter dividend:""); 

 printf(""Enter divisor:""); 

 scanf(""%d"", &dividend); 

 scanf(""%d"", &divisor); 

 // Computes quotient 

 quotient = dividend / divisor; 

  

 // Computes remainder 

 remainder = dividend % divisor; 

  printf(""Quotient = %d
"", quotient); 

   return 0; 

 }",C Program to Compute Quotient and Remainder
" #include<stdio.h> 

 int main() {

 int intType;

 float floatType;

 double doubleType;

 

 char charType; 

 // sizeof evaluates the size of a variable 

 printf(""Size of int: %zu bytes
"", sizeof(intType)); 

 printf(""Size of float: %zu bytes
"", sizeof(floatType)); 

 printf(""Size of double: %zu bytes
"", sizeof(doubleType)); 

 printf(""Size of char: %zu byte
"", sizeof(charType));  

 return 0; }","C Program to Find the Size of int, float, double and char"
"#include <stdio.h> 

 int main() { 

 int a;

 long b;   // equivalent to long int b; 

 long long c;  // equivalent to long long int c;

  double e;

 long double f;

 printf(""Size of int = %zu bytes 
"", sizeof(a)); 

 printf(""Size of long int = %zu bytes
"", sizeof(b)); 

 printf(""Size of long long int = %zu bytes
"", sizeof(c));

 printf(""Size of double = %zu bytes
"", sizeof(e)); 

 printf(""Size of long double = %zu bytes
"", sizeof(f)); 

  return 0; 

 }",C Program to Demonstrate the Working of Keyword long
"#include<stdio.h> 

 int main() { 

 double first, second, temp; 

 printf(""Enter first number:"");

 scanf(""%lf"", &first); 

 printf(""Enter second number: ""); 

 scanf(""%lf"", &second); 

 // value of first is assigned to temp 

 temp = first; 

  // value of second is assigned to first 

  first = second; 

 // value of temp (initial value of first) is assigned to second 

 second = temp;

 // %.2lf displays number up to 2 decimal points 

 printf(""
After swapping, first number = %.2lf
"", first);

 printf(""After swapping, second number = %.2lf"", second);

 return 0; }",C Program to Swap Two Numbers
" #include <stdio.h>

  int main() { 

 int num; 

 printf(""Enter an integer: ""); 

 scanf(""%d"", &num); 

 // true if num is perfectly divisible by 2 

 if(num % 2 == 0) 

    printf(""%d is even."", num);

  else 

 printf(""%d is odd."", num);

 return 0; }",C Program to Check Whether a Number is Even or Odd
"#include <stdio.h> 

 int main() { 

 char c; 

 int lowercase_vowel, uppercase_vowel; 

 printf(""Enter an alphabet:"");  

 scanf(""%c"", &c); 

 // evaluates to 1 if variable c is a lowercase vowel 

 lowercase_vowel = (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u'); 

 // evaluates to 1 if variable c is a uppercase vowel 

 uppercase_vowel = (c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U'); 

 // evaluates to 1 (true) if c is a vowel 

 if (lowercase_vowel || uppercase_vowel) 

 printf(""%c is a vowel."", c); 

 else 

 printf(""%c is a consonant."", c);

  return 0;}", C Program to Check Whether a Character is a Vowel or Consonant
" #include <stdio.h> 

 int main() { 

 double n1, n2, n3; 

 printf(""Enter three different numbers: ""); 

 scanf(""%lf %lf %lf"", &n1, &n2, &n3); 

 // if n1 is greater than both n2 and n3, n1 is the largest 

 if(n1 >= n2 && n1 >= n3) 

 printf(""%.2f is the largest number."", n1); 

  // if n2 is greater than both n1 and n3, n2 is the largest 

 if (n2 >= n1 && n2 >= n3) 

 printf(""%.2f is the largest number."", n2); 

 // if n3 is greater than both n1 and n2, n3 is the largest 

 if (n3 >= n1 && n3 >= n2) 

 printf(""%.2f is the largest number."", n3);

 return 0;}",C Program to Find the Largest Number Among Three Numbers usinf if statement
"#include <stdio.h> 

 int main() { 

 double n1, n2, n3; 

 printf(""Enter three different numbers:""); 

 scanf(""%lf %lf %lf"", &n1, &n2, &n3); 

 // if n1 is greater than both n2 and n3, n1 is the largest 

 if (n1 >= n2 && n1 >= n3) 

 printf(""%.2f is the largest number."", n1); 

 // if n2 is greater than both n1 and n3, n2 is the largest

 if (n2 >= n1 && n2 >= n3)

 printf(""%.2f is the largest number."", n2);

  // if n3 is greater than both n1 and n2, n3 is the largest 

 if (n3 >= n1 && n3 >= n2) 

 printf(""%.2f is the largest number."", n3); 

 return 0; } ",C Program to Find the Largest Number Among Three Numbers using if else statements
"#include <math.h> 

 #include <stdio.h> 

 int main() { 

 double a, b, c, discriminant, root1, root2, realPart, imagPart;

 printf(""Enter coefficients a, b and c:"");

 scanf(""%lf %lf %lf"", &a, &b, &c);

 discriminant = b * b - 4 * a * c; 

 // condition for real and different roots 

  if (discriminant > 0) { 

  root1 = (-b + sqrt(discriminant)) / (2 * a);

  root2 = (-b - sqrt(discriminant)) / (2 * a);

 printf(""root1 = %.2lf and root2 = %.2lf"", root1, root2);

 } 

 // condition for real and equal roots 

 else if (discriminant == 0) {

 root1 = root2 = -b / (2 * a); 

 printf(""root1 = root2 = %.2lf;"", root1);

 } 

 // if roots are not real 

 else { 

 realPart = -b / (2 * a);

 imagPart = sqrt(-discriminant) / (2 * a);

 printf(""root1 = %.2lf+%.2lfi and root2 = %.2f-%.2fi"", realPart, imagPart, realPart, imagPart); 

 } 

       return 0; 

 } ",C Program to Find the Roots of a Quadratic Equation
" #include <stdio.h> 

 int main() { 

 double n1, n2, n3; 

 printf(""Enter three numbers:""); 

 scanf(""%lf %lf %lf"", &n1, &n2, &n3);

 // outer if statement 

 if (n1 >= n2) { 

 // inner if...else 

 if (n1 >= n3) 

 printf(""%.2lf is the largest number."", n1); 

 else

 printf(""%.2lf is the largest number."", n3); 

 } 

 // outer else statement

 else { 

 // inner if...else 

 if (n2 >= n3)

 printf(""%.2lf is the largest number."", n2);

 else

 printf(""%.2lf is the largest number."", n3); 

 }

 return 0;}", C Program to Find the Largest Number Among Three Numbers using nested if statement
"#include <stdio.h> 

 int main() { 

 int year; 

 printf(""Enter a year:""); 

 scanf(""%d"", &year); 

 // leap year if perfectly divisible by 400 

 if (year % 400 == 0) { 

 printf(""%d is a leap year."", year); 

 } 

 // not a leap year if divisible by 100 

 // but not divisible by 400 

 else if (year % 100 == 0) { 

 printf(""%d is not a leap year."", year); 

 } 

 // leap year if not divisible by 100 

 // but divisible by 4 

 else if (year % 4 == 0) {

 printf(""%d is a leap year."", year); 

 } 

 // all other years are not leap years 

 else { 

 printf(""%d is not a leap year."", year); 

 } 

 return 0; } ",C Program to Check Leap Year 
"#include <stdio.h> 

 int main() { 

 double num; 

 printf(""Enter a number:""); 

 scanf(""%lf"", &num); 

 if (num <= 0.0) { 

 if (num == 0.0) 

 printf(""You entered 0.""); 

 else 

 printf(""You entered a negative number.""); 

 }  

 else 

 printf(""You entered a positive number.""); 

 return 0; 

 }", C Program to Check Whether a Number is Positive or Negative
"#include <stdio.h> 

 int main() { 

 char c; 

 printf(""Enter a character:"");  

 scanf(""%c"", &c); 

 if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) 

 printf(""%c is an alphabet."", c); 

 else 

 printf(""%c is not an alphabet."", c); 

 return 0;}", C Program to Check Whether a Character is an Alphabet or not